Portuguese Crew Member Safe in Cabo Verde Hantavirus Outbreak

The cruise ship MV Hondius remains anchored off the coast of Cabo Verde with 147 people on board — including one Portuguese crew member who is reportedly in good health — as authorities manage a rare hantavirus outbreak that has killed three and left at least two others requiring intensive medical care. The ship has been barred from docking in the port of Praia under international health regulations, with full hazmat-suited medical teams boarding repeatedly to monitor the situation.

Why This Matters

• A Portuguese national is among the 147 people on board, part of the crew, and is currently well according to Portugal's State Secretariat for Communities.

• Hantavirus is rare and deadly: At least one lab-confirmed case exists, with the mortality rate for severe respiratory forms reaching 35% to 45%.

• No public health risk in Cabo Verde so far, but the ship cannot dock until the outbreak is contained and medical evacuations are completed.

• Air ambulance evacuation is being coordinated to transport symptomatic crew members from Praia to the Netherlands or specialized facilities.

Portuguese Crew Member Confirmed Healthy

The Portugal Ministry of Foreign Affairs confirmed that a Portuguese citizen is aboard the Hondius as part of the crew. According to the State Secretariat for Communities, the individual is in good health and has not requested consular assistance or medical support. "We have not received any request for assistance and, as far as we have been able to determine, this citizen is well," a spokesperson stated.

The confirmation came after CNN reported the presence of a Portuguese national on the vessel, prompting queries from Portuguese media outlets and consular follow-up. The crew member remains subject to the same quarantine protocols and health monitoring as the other 146 people aboard, who represent 23 different nationalities.

Death Toll Rises as Lab Confirms Hantavirus

Three passengers have died since the outbreak began during the ship's voyage from Ushuaia, Argentina, to the Canary Islands, with stops for wildlife observation in the Antarctic and remote South Atlantic islands including Saint Helena and Ascension Island. The victims include a 70-year-old Dutch man, whose body was removed at Saint Helena; his 69-year-old wife, who was airlifted to South Africa but died from complications before she could return home; and a third person whose body remains aboard the vessel in Cabo Verde.

A British passenger was evacuated to intensive care in South Africa and tested positive for hantavirus in laboratory analysis — the only confirmed case so far. The World Health Organization (WHO) announced that genomic sequencing is underway to determine whether the virus is the Andes strain, a South American variant known to be the only hantavirus capable of limited human-to-human transmission. Even so, WHO officials emphasize that interpersonal spread is "very rare" and typically requires prolonged close contact.

Two crew members currently aboard are symptomatic and stable but require urgent specialist care. A third individual, who shared a cabin with one of the deceased, is also being evaluated for possible evacuation. Blood and urine samples collected from the symptomatic cases have been sent to the Institut Pasteur in Dakar, Senegal, approximately 600 km away, with results expected by Tuesday.

Cabo Verde Enforces Strict Quarantine Protocols

The Cabo Verde Ministry of Health announced that the ship would not be permitted to dock at the port of Praia, following a technical and epidemiological assessment conducted in line with the International Health Regulations. The decision aims to protect the local population from potential exposure to the virus, which is primarily transmitted through contact with rodent saliva, urine, or droppings — or by inhaling contaminated dust particles.

Medical teams equipped with full protective suits have boarded the vessel multiple times to assess patients and prepare for possible medical evacuations. "The situation is under control, and medical teams are now on the ship evaluating two crew members with symptoms," said Ann Lindstrand, a WHO representative coordinating the international response. "I want to congratulate the authorities of Cabo Verde for their rapid and professional response from the first hour."

The Cabo Verde Health Ministry has set up a specialized response unit at Hospital Dr. Agostinho Neto in Praia, staffed by doctors, nurses, and laboratory technicians, ready to provide advanced care if required. Coordination is ongoing with health authorities in the Netherlands (the ship's country of registration), the United Kingdom, and Spain, where the vessel is expected to travel next for further investigation and potential disembarkation.

What This Means for Residents and Travelers

For Portuguese nationals and residents planning travel to or from Atlantic island destinations, the Hondius outbreak serves as a stark reminder of the unpredictable risks associated with expedition cruising — especially routes that include remote wilderness areas. Wildlife observation cruises, particularly those visiting the Antarctic and sub-Antarctic islands, involve exposure to environments where rodents and their pathogens are endemic.

While the Portugal health authorities have not issued travel warnings related to this incident, the case underscores the importance of travel insurance with medical evacuation coverage. Air ambulance transfers from isolated Atlantic islands can cost upwards of €100,000, and travelers without adequate insurance may face severe financial strain. Portuguese travelers booking expedition cruises should verify that their policies cover pandemic and epidemic-related evacuations, as some insurers exclude such scenarios.

The Cabo Verde Ministry of Health has assured the public that there is no risk to the population on land, and the WHO echoes this assessment, stating that the national risk in Cabo Verde is "very low" and the regional risk is "low." However, the ship made several stops at various islands before reaching Cabo Verde, raising concerns about whether passengers who disembarked earlier could have carried the virus to other locations. Epidemiological tracing is underway.

How Hantavirus Spreads and Why It's Dangerous

Hantaviruses are a family of viruses carried by wild rodents such as rats and mice. Humans become infected primarily through inhalation of airborne particles from dried rodent urine, droppings, or saliva, or through direct contact with contaminated surfaces. The virus does not spread easily between people, with the Andes strain being the rare exception.

The incubation period ranges from one to eight weeks, which complicates outbreak investigations. Symptoms initially resemble the flu: fever, headache, muscle pain. In severe cases, patients develop Hantavirus Pulmonary Syndrome (HPS), which can rapidly escalate to acute respiratory distress and circulatory shock. The mortality rate for HPS is between 30% and 45%, even with intensive care.

There is no vaccine and no specific antiviral treatment for hantavirus infections. Medical care focuses on supportive measures: oxygen therapy, mechanical ventilation, and fluid management. Early recognition and hospitalization improve survival rates, but the disease progresses quickly once respiratory symptoms begin.

Investigating the Source of Contamination

Investigators are trying to determine how the virus came aboard the Hondius. The leading hypotheses include:

• Rodent infestation on the ship: Rats or mice may have nested in storage areas, cabins, or ventilation systems. The virus can linger in dried droppings for weeks, and cleaning or moving materials can aerosolize infectious particles.

• Pre-boarding exposure in Argentina: Passengers may have contracted the virus during land excursions in Patagonia, where the Andes strain is endemic. The lengthy incubation period means symptoms may not appear until well into the voyage.

• Person-to-person transmission: If the Andes strain is confirmed, limited secondary transmission among passengers in close quarters is theoretically possible, though still considered rare.

The WHO is coordinating with Spanish health authorities to conduct a deeper investigation once the ship reaches the Canary Islands, where passengers will undergo health screenings and epidemiological interviews. "Our role right now is to assess the public health risk," Lindstrand explained. "We are conducting a trace-back investigation to find out where the virus came from."

Mental Toll on Passengers and Crew

For the 147 people aboard the Hondius, the ordeal has stretched beyond five days. "It is a very difficult situation, this waiting, from a mental health perspective, knowing what happened with the severe cases," Lindstrand told journalists. "But the captain and health authorities are continuously informing passengers."

The Oceanwide Expeditions, the Dutch company operating the cruise, has not issued a detailed public statement beyond confirming that its priority is ensuring medical care for the sick crew members. The company has faced criticism in the past for expedition safety protocols, though no direct link has been established between operational practices and the current outbreak.

Once symptomatic passengers are evacuated and cleared by medical teams, the ship is expected to proceed to the Canary Islands for weeks of monitoring and additional health investigations, as initially planned before the outbreak derailed the itinerary.

What Happens Next

Medical evacuations by air ambulance are expected imminently, pending confirmation of flight schedules and logistical coordination between Cabo Verde, the Netherlands, and possibly Spain. After the symptomatic cases are removed, the remaining passengers and crew will likely be allowed to disembark under controlled conditions in the Canary Islands, where they will undergo quarantine observation.

The Portugal State Secretariat for Communities confirmed it is monitoring the situation closely and remains ready to provide consular assistance if the Portuguese crew member's condition changes or if support is requested. For now, the message from both Portuguese and international health authorities is clear: the situation is contained, the risk to the broader public is minimal, and the focus is on ensuring the best possible care for those already affected.